【Please check out the PR!】BSS (I liked them first) refers to a situation where someone you have unrequited feelings for, without having confessed your love, gets taken by someone else. It's similar to NTR, but since no romantic relationship has been established, no one is at fault, and you can experience strong self-loathing and frustration. This work is the quintessential BSS scenario where the protagonist is a man who can't do anything because his crush starts dating his best friend before he confesses.
